Radio tube socket



Sept. 7, 1937.

D. T. MITCHELL RADIO TUBE SGCKET Filed Aug. 29, 1936 INVENTOR mLbcPU/f,

ZW ATTORNEY Patented lsept'. .1, 1931 aosam mimo 'runs socx'n'r mums '1'. Minnen, New roi-k, N. Y.v Application August 29, 1935,v Serial No. 98,442

My invention relates to improvements in radio sockets, and its object is to produce a socket that can be assembled economically, by mounting the prong contact andA the soldering lug' thereof through thesame hole of the insulated plate.

Another object of the inventionl is to provide a socket in which the prong contact and the soldering lug are so arranged that solder is prevented 4from running into the contact when applied tothe lug.

A A further object of theA Invention is to arrangel the prong contact and the soldering lllhereof so as'to provide a good frictionalcontact for the prong ,of the tube without diminishing the rigid connection between the prong contact and the angular. apertures 1 disposed circumferentially4 and symmetrically to the radii of-a central openingV i 8. Said opening 8 has a notch I for the proper position of .a radiotube'in the socket. n

Engaging. the triangular openings 1 are prong contacts Il, best shown in Figures 2, 3, and 4. The prong contact Il is formedof .a,.s1itted tri angularly shaped tube II and a soldering lug I united to the tube by a bridge` I1.- The slit I2 of the tube I I is formed at the edge of the tube by the two sides or walls I2 and Il.' The back side or wall I5 opposite the slit I2 is united to the soldering lug I5 by the bridge I1 previously referred to, thev said bridge'maintaining the tube Pand the lug in spaced relation.I

4.A portion of the lug Il extending beyond the tubular portion of the contact IU is deilected or bent from said tubular part to facilitate the attaching thereto of wire'sfor which apertures' 'I2 and" are providedinsaid lug I5.

When ,the contact I5 is engaged into the triangular openingz1 of the 'plate 5, the lug Ilat the bridge I1 is made to engage the side 25 of the triangular opening 1 whichl is remote fromthe center, while the walls I3 and. Il of the Atubular 55, contact II'will be located 'at the two othersides solder is is a perspective view 'ofaprong con- Uall'lF.|)v STATES pATN-.l'yoppi of thesaid opening 1 with a. slight clearance .-therewith.

The lug I5 at the bridge I1 has flanges 2l which are adapted to rest between plates 5 and 5. -A

fiange'22 is also provided on each of the walls I3 and I4 at the slit I2.` The said flanges are formed to lie substantially in the same plane-with flanges 2| and are therefore also located between the said plates 5 and i.

The ilanges22 have rounded edges 23 to prevent sparking between the flanges of proximate prong contacts located in the adjacent opening '1. The flanges 2i and 22 located between the plates 5 and 6', secure the prong contacts between said plates when said plates are attached together by eyelets 24.' In addition', the plates have openings 25, bymeans of which they are secured to al chassis. .This means of attachment also serves as an additional means :for securing the contact betweenthe plates 5 and 6.

The plate 5 is provided with openings 26, registering with the triangular opening 1, and through which openings the prongs of a radiotube pass into the'slitted tubular contacts Il located between the plates as described.

To insure -a perfect contact between the prong i of a radio tube and the triangular tube II of the contact I5, the back wall I5 of the tube II and` the bridge I1 has a cut-out 21 which permits the back wall.I5 to flex when a prong is forced into the slitted triangular tube II. Thus, the triangular slitted tube. II provides a three-sided frictional contact. Thetwosides I3 and I4 are permitted to ilex, due to the provision of the slit I2 between the saidV sides. In addition, the back wall or side I5 is permitted to flex due to the provision of thecut-out 21.

Byproviding a bridge I1 between the soldering lug I5 and the back wall I5 of the tubular contact,

any excess solder that may run oil the lug I6 is prevented from entering the inside of thetubularl contact I I `byfsaid bridge I1, for said bridge permits the solder to accumulate thereat betweenV the facing sides of the lug and the .wall I5 of the tubular contact II i By making the contact with four flanges as described, at the point where it is to` be attached to sion for my prong contact'. In consequence of such a suspension, I can. engage both the tubular contact and its soldering lug through the same opening ofthe plate, which isa more economical method than the one in which the tubular partI and the soldering lug are threaded through in-` dependent openings, by mounting the prong con-V the socket,.1provide a four-point rest or suspentact and soldering lug through the same opening in the insulated plate. Thus, there is a. saving in tool construction for the plate with less possibility of breaking of tool parts.

To facilitate the soldering of the proper wires to the proper lugs, the triangular openings which i spacing it therefrom, said lug and tubular part having iianges for engaging between said plates, so that the lug at the bridgey engages one of the sides of a triangular opening in the plate, While the other two sides of the tubular part not connected to the lug by the bridge are at the other two sides of the triangular openings, and means for securing the plates together which also secure the contacts to the plates. f

2. A radio socket comprising an insulated plate having a plurality of triangular openings circumierentially disposed thereon, a second insulated plate of similar contour having circular openings thereon registering with the triangular openings of the rst plate, a contact for each of said openings comprising a triangular slitted tubular part,

a soldering lug and a bridge connecting the lug l to the tubular part and spacing it therefrom, said lug and tubular part having vflanges engaging between said plates when said contact with the lug is positioned in a triangular opening, said contact having a cut-out in the tubular part thereof at the bridge, and means for connecting the plates together whereby the contacts are connected to the plates.

3. In a radio socket, an insulated plate having a pluralltgr of triangular openings circumferentially disposed thereon, a second insulated plate oi similar contour having circular openings therein registering with the triangular openings of the first plate, a contact for each of said triangular openings comprising a triangular tubular portion slitted at the meeting edges of the two sides;

thereof, a solderingF lug and a bridge uniting the soldering lug to the side of the triangular tubular portion which faces the slit and maintaining said lug in spaced relation therefrom, said lue adapted to engage at the bridge one side of the triangular opening when a contact is inserted therein, flanges on the. lug at the bridge, and rounded flanges at the slit on the side of the triangular tubular portion of the contact in a plane with the flanges on the lug, said anges adapted to be located between the plates, and means for securing said plates together whereby the contacts are secured to the plates.

' DOUGLAS vT. MITCHELL. 

